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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2013 Harald Hoyer
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="kernel-install">
<refentryinfo>
<title>kernel-install</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Harald</firstname>
<surname>Hoyer</surname>
<email>harald@redhat.com</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>kernel-install</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>kernel-install</refname>
<refpurpose>Add and remove kernel and initramfs images to and from /boot</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>kernel-install</command> <arg choice="req">COMMAND</arg> <arg choice="req">KERNEL VERSION</arg> <arg choice="req">KERNEL IMAGE</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>kernel-install</command> is used to install and remove kernel and
initramfs images to and from <filename>/boot</filename>.
</para>
<para>kernel-install will execute the files located in the directory <filename>/usr/lib/kernel/install.d/</filename>
and the local administration directory <filename>/etc/kernel/install.d/</filename>.
All files are collectively sorted and executed in lexical order, regardless of the directories in
which they live. However, files with identical file names replace each other.
Files in <filename>/etc/kernel/install.d/</filename> take precedence over files with the same name
in <filename>/usr/lib/kernel/install.d/</filename>. This can be used to override a system-supplied
executables with a local file if needed; a symbolic link in <filename>/etc/kernel/install.d/</filename>
with the same name as an executable in <filename>/usr/lib/kernel/install.d/</filename>,
pointing to /dev/null, disables the executable entirely. Executables must have the
extension .install; other extensions are ignored.</para>
</refsect1>
<refsect1>
<title>Commands</title>
<para>The following commands are understood:</para>
<variablelist>
<varlistentry>
<term>add <KERNEL VERSION> <KERNEL IMAGE></term>
<listitem>
<para>calls every executable <filename>/usr/lib/kernel/install.d/*.install</filename>
and <filename>/etc/kernel/install.d/*.install</filename> with the arguments
"add <KERNEL VERSION> <filename>/boot/<MACHINE-ID>/<KERNEL VERSION>/</filename>"</para>
<para>kernel-install copies <KERNEL IMAGE> to
<filename>/boot/<MACHINE-ID>/<KERNEL VERSION>/linux</filename>.</para>
<para>kernel-install also creates a boot loader entry according to the boot loader specification
in <filename>/boot/loader/entries/<MACHINE-ID>-<KERNEL VERSION>.conf</filename>.
If the file <filename>initrd</filename> is found next to the <filename>linux</filename> file,
the initrd will be added to the configuration.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>remove <KERNEL VERSION> <KERNEL IMAGE></term>
<listitem><para>calls every executable <filename>/usr/lib/kernel/install.d/*.install</filename>
and <filename>/etc/kernel/install.d/*.install</filename> with the arguments:
"remove <KERNEL VERSION> <filename>/boot/<MACHINE-ID>/<KERNEL VERSION>/</filename>"
</para>
<para>kernel-install removes the entire directory <filename>/boot/<MACHINE-ID>/<KERNEL VERSION>/</filename>
and the file <filename>/boot/loader/entries/<MACHINE-ID>-<KERNEL VERSION>.conf</filename></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Exit status</title>
<para>If every executable returns with 0, 0 is returned, a non-zero failure code otherwise.</para>
</refsect1>
<refsect1>
<title>Files</title>
<variablelist>
<varlistentry>
<term>
<filename>/usr/lib/kernel/install.d/*.install</filename>
<filename>/etc/kernel/install.d/*.install</filename>
</term>
<listitem>
<para>Drop-in files, which are executed by kernel-install.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/kernel/cmdline</filename>
<filename>/proc/cmdline</filename>
</term>
<listitem>
<para>The content of the file <filename>/etc/kernel/cmdline</filename> specifies the kernel command line to use.
If that file does not exist, <filename>/proc/cmdline</filename> is used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/machine-id</filename>
</term>
<listitem>
<para>The content of the file specifies the machine identification <MACHINE-ID>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<filename>/etc/os-release</filename>
</term>
<listitem>
<para>The content of the file specifies the operating system id <OS-ID>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<ulink url="http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec">Boot loader specification</ulink>
</para>
</refsect1>
</refentry>
|
